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    <h1 class="topictitle1">zero_allocator</h1>

    
<div><div class="section"><h2 class="sectiontitle">Summary</h2>
        <p>Template class for allocator that returns zeroed memory. </p>

        </div>
<div class="section"><h2 class="sectiontitle">Syntax</h2>
<pre>template &lt;typename T, 
          template&lt;typename U&gt; class Alloc = tbb_allocator&gt; 
class zero_allocator: public Alloc&lt;T&gt;;
</pre>
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<div class="section"><h2 class="sectiontitle">Header</h2>
<pre>#include "tbb/tbb_allocator.h"</pre>
</div>

<div class="section"><h2 class="sectiontitle">Description</h2>

        <p>A <samp class="codeph">zero_allocator</samp> allocates zeroed memory. A
                        <samp class="codeph">zero_allocator&lt;<em>T,A</em>&gt;</samp> can be instantiated for any
                    class<em> A</em> that models the Allocator concept. The default for <em>A</em> is
                    <samp class="codeph">tbb_allocator</samp>. A <samp class="codeph">zero_allocator</samp> forwards
                allocation requests to <em>A</em> and zeros the allocation before returning it.</p>

        </div>
<div class="section"><h2 class="sectiontitle">Members</h2>
<pre>namespace tbb {
    template &lt;typename T, template&lt;typename U&gt; class Alloc = tbb_allocator&gt;
    class zero_allocator : public Alloc&lt;T&gt; {
    public:
        typedef Alloc&lt;T&gt; base_allocator_type;
        typedef typename base_allocator_type::value_type 
                                              value_type;
        typedef typename base_allocator_type::pointer pointer;
        typedef typename base_allocator_type::const_pointer 
                                              const_pointer;
        typedef typename base_allocator_type::reference 
 reference;
        typedef typename base_allocator_type::const_reference 
                                              const_reference;
        typedef typename base_allocator_type::size_type 
                                              size_type;
        typedef typename base_allocator_type::difference_type 
                                              difference_type;
        template&lt;typename U&gt; struct rebind {
            typedef zero_allocator&lt;U, Alloc&gt; other;
        };

        zero_allocator() throw() { }
        zero_allocator(const zero_allocator &amp;a) throw();
        template&lt;typename U&gt;
        zero_allocator(const zero_allocator&lt;U&gt; &amp;a) throw(); 

        pointer allocate(const size_type n, const void* hint=0);
    };
} 
 </pre>
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<div class="parentlink"><strong>Parent topic:</strong>&nbsp;<a href="../../reference/memory_allocation.htm">Memory Allocation</a></div>
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